Three examples of convection currents are:

1. Atmospheric Convection Currents: These occur in the Earth's atmosphere, where uneven heating leads to the rising of warm air and the sinking of cooler air, creating weather patterns.

2. Oceanic Convection Currents: In the oceans, warmer surface waters rise, move away from the equator, cool, and sink, helping to distribute heat and regulate global climate patterns.

3. Mantle Convection Currents: Within the Earth's mantle layer, heat from the core causes material to rise, cool, and sink, driving plate tectonics and geological processes.